v3.4.1
Fix part of issue #8423 Lint concatenation checker (#19908)
Fix part of #20303: Rename image-uploader component to image-receiver (#20370)
Separate exploration data files from other extensions.
Apply prettier 2 (#19862)
Fix of #9749: Migrate non-negative-int, numeric-expression, position-of-terms, positive-int, ratio-expression, real, sanitized-url, set-of-algebraic-identifier, set-of-translatable-html-content-ids, subtitled-html editors (#12554)
Fix #14085: Deprecate math interactions' unsupported rules and update cust arg name. (#15271)